Improvement in heating-furnaces



S. D. VOSE.

HEATING-FURNACE.

Patented J-an. 4,1876.

FIG I INVENTOR WITNESSES To altwhom '1' t may concem,

, sm t-t nivosn, on M LwAUKEn, wisconsin.-

IMPROVEMENT InHEATiNG-FURN'A cEs.

Specification formingpart ofLettersPatent N0. 17 dated January 4, 1876; appli'cationiiled I V V Y Ju1 1e5,;18 72:'

Beit known that L sAMUELqD- VOSE, of Milwaukee, ,in the count'ypf Milwaukee and State of Wisconsin, liave invented certain new and useful Improvements ;in.l ,Heating- Furnaces, and Ifdo hereby declare that the tollowingfis a full, clear,. and exactdescription thereof, which wilhenable others skilled in the art to "wmc11. ,it, pertains; to. make and use the same, reierencebcinghad to, the accompanying drawing, and t0; th e. letters of referencemarked thereon, which fol-ma part ofthis specification. .y p

, .My desire is to producea furnace designed with a special view to properly heat the largest quantity of air possible,. t v;ith the simplest-con;- Stl'llUiZlOlLOf; furnace.

j Theimprovements iusuch furnace will be specilically'pointed out in the claims..,,; v I am aware, however,tl1at a drop-flue above the combustion-chain ber, is not new ;}and that a series of vertical radial blades have been combined withthe outenwa-ll offt-he fire-pot,

both with an outside drum communicating with a top drum, or by an outer-side case extending from the bottom to the top of the furnace; but my improvements involve a more simple and advantageous construction of the furnace, which I shall distinguish in the claims. In the accompanying drawings, Figure 1 represents an elevation of the furnace without its inclosing-case; Fig. 2, a vertical section, showing also the inclosing-case of the furnace Fig. 3, a horizontal section through the sunken or drop-flue chamber; and Fig. 4:, a similar section, taken through the fire-pot and its jacketed blades on the line b b of Fig. 2.

The furnace has theusual fire-chamber A, and the ash-pit B, and from the arch O of'the fire-chamber the usual flue-pipes D rise and connect with the top flue-chamber E, with which the smoke-pipe F connects. The furnace is inclosed by a case of metal or brick-work, to

Y form the usual hot-air. space G, and with which the pipes at connect and lead to.the several rooms of the building to be heated. This hotair space G is closed at its bottom by means of a flange, b, and envelops the furnace, as

shown in Fig. 2. The exterior walls of the fire-pot are provided with radial heat-absorbing blades H,arranged at suitable distances apart, and extending from th'e'bottomlt'o the .topof. the fire-pot. 1 Withthese radial blades I combine a jacket, I, whiclnsurroundingthem.

closelyand joining the bottom flange or rim b,

forms a series of-box-cha'mberaJ, open at the, bottom at c for the inlet of air,-and at:-their upperends forthe outlet thereof into the hot gair space-Gr surrounding the furnace. Iain these upperv openings,- the jacket '1 does. jnotinclose the full length ofthe radial blades .H, but stops short of their upper endsto leave openings at about equal in areato the space, formed between the walls of the box-flues; As. the bottomtlange or. rinrb extends outward from the lower edge of the jacket I,,-and-joins the lower edge of the inclosing-case,:thejacket.

To ob willnecessarily occupy a position intermedb ate with. the'walls of the firefpot andthe outer casing, and form thereby a lloii conducting chamber, G to prevent the lossof heat from the box-fines, and'to hold the lfifiat radiated: from their inclosing-jacket. Thejc'oldairen teringv and passing into the-box-flues is forced:

into direct contact with the outer .wall of the fire-pot, the inner wall of the jacket, and the sides of the radial blades, and as the latter become as highly heated as the fire-pot thecold air is thereby highly heated, and, passing into the hot-air space G, joins the heated/air in the non-conducting chamber G and passes upward with the draft, which is rendered quite rapid, through the box-fines in consequence of the intense heat therein, and the tendency of the cold air to rush in, and filling the series of hot chambers, passes out and receives increased heat in contact with the entire upper section of the furnace. This not only gives a larger volume of incoming air, but obtain from the box-fines a very largely increased heatingsurface at the very point most needed to obtain the best efl'ect.

A flue-chamber, E, surmouuts the furnace and communicates' with the fire-chamber by a series of vertical flue-pipes, D, arranged in a circle in the space between these two chambers,

and through which pipes the products of combustion pass to the smoke-pipe. The fluechamber E is of peculiar construction, and consists of a sunken or drop flue, M, dependin g centrally fromits bottom plate 0, and near- 1y reaching the arch of the fire-chamber, and

with the fire-chamberlis th reug h ls thewsunkeu flue; The sunken flue is"formedlwithiilthe circle ot'the flue-pipes, and it tapers downwarq, its pottete being Qrqu ri led and the eena ic seetion, beinghollew, opens linto the" 110t air chamber G, and leavesa. space, g, between mproiei t -w im pejii ilireet arm with the meme-" rout ansoon that gather in the ana e compressea w t inw smallest It is obvious that the inclosingmase may be f (lispensedwith audfihe 11" hfthe 11mm epzu'ze G,"and the closed topeh amberEgkof the chamwhe M l eud e ii tq baidvhmbe G, vda h ehamber 9, opening upwardtherein,ywith lthe smoke-pipe F, passingtl1erefrom througlrgthe c amb s 1 Gr, asand?!th mirpow etlfmz h 1 Q12, The air-chamber gfeud the drop! flue chamber M, Cqlll bil led wltl i the jchambersgE and G, the smokepipe F,1and\the flue-pipesfl), as described. 5 3. The combinati 

